Safety device for looms



Sept. 9, 1930. F. D SAYLOR SAFETY DEVICE FOR LOOMS 3 Sheets-Sheet 1 Filed April 6, 1928 I N VEN TOR.

ATTORNEY.

Sept. 9, 1930. F. D. SAYLOR i 1,115 32 SAFETY DEVICE FOR LOOMS V Filed April 6, 1928 5 Sheets-Sheet 2 4 f5 id A TTORNEY P 1930- F. D. SAYLORj I 1,775,325

SAFETY DEVICE FOR LOOMS Filed April 6, 1928 5 Sheets-Sheet 3 92 if INVENTOR 94 b 95 9/ Jaw/5% J, ATTORNEY.

Patented Sept. 9, 1930 FRANK I). SAYLOR, or DETROIT, MIGHIGAN SAFETY DEVICE roit tooivrs hpplicatioh filed April 6, 192a serial No. "287,383.

1 The present invention relates to looms or machines for weaving tubular fabric and more especially, to safety devices for the same. V 5 Among the objects "oftheinventionis to provide means to reduce the supervision required whensuch machines are operating, 1 by providing 'autoinatic'means to stop the mechanism upon breaking of a Weft strand.

Other objects will readily occurto those skilledin the art upon reference to the following description and the accompanying drawings, in which V Figure 1, is-aplan view of the machine with parts omitted for clear-rises;

Figure 2, is a vertical section on line 2-2 of Figure 1;

Figure 3, is an enlarged View, partly in section, of the shuttle moving means;

60 movingparts.

Mounted on base 11, is -a shaft 13 carried in suitable bearings, not shown, which shaft has keyed thereto a gear 14; whichmay form part of a sleeve 15 which carries a pulley 16.

85 Also carried on shaft 13 is an idler pulley 17.

Fixed centrally on the base 11 is a vertical tube 20 which serves as a fixed shaft about which rotates the frame member 21. This member 21 is supported on the base 11 by a.

40 suitable anti-friction bearing 22 and incliides an outwardly extending portion 23 having at its outer edge a downwardly extending cylindrical part 2 1 in whose outersurrace is a pair of slots 25 for a purpose to be mentioned 4 later. The bottom ed'ge'of portion 2 1 is pro vided with a ring gear 26 which coacts with the 14 to drive the member 21.

Located above the part 23 of member 21 is a] second outwardly extending frame portion 5 30 carrying on its upper side a pair orsmall Figure 4:, is a plan view of one of the shuttle frames 31, each having beari rigsf32 for shafts '33. The shaft 33 hasat one end asin-all wheel 34 and at the other end a second Vii 166135.

"The fraine 31 and its associated parts is shown 'in enlargedview iiirFigure 3; This figure shows that one of thebearings- 32 for shaft 33 consists of a bearin part: 3; mounted as a plunger in the inner end (if theirame and supported by a spring 32 sothatythe shaft 33 and the wheeled will be spring pressed upwardly;

Also carried on: the hollow shaft20 is a head member 40 which has on the underside of its periphery a track 41 for wheel 34 and against which the Wheel E lis spring pressed, as isinentioned above.

Thishead member 40 furnishes support on the upper side of its peripheryif'or the small wheels 42 which will be more particularly described later. 7 i

The upper end ofthe shaft 20 is Open and may have fixed therein a hollow inandrel tii servingas the outside for ii i'for thetubular product which passes down through'the shaft 20 to a suitable receiver, and fixed-above the upper end of the tube isa snialliraine-M carried upon an arm 15 suitably supportedby the outside frame 12 This arrncarries an mandrel 46, whose lower end extends downirito the tube 20;an'd serves as the-inside formror the tubular product. 1

Thisfram'emember 44 is "provided at its lower edge with a track portion 457 which overliesthe small wheels 42 hereinbetore mentioned; I 1 i Carried by the outer ifranie 12 is a 'fixedupright cylindrical member 50 having a plurality of vertical slots 51 throughwhich slots extend the warp cords 52, each-o f these cords extending from a-suita ble reel, not shown, through eye 53 onthe side of the frame and through a second eye in a zguiderod 54. From the rod 54, the cords extend each through an eye in a heddle 55, which heddle passes through a suitable opening inrnernber 50 and has atits lower end a small roller 56 adapted to travel in one oiithe grooves 25. The grooves 25am so arranged thattheycross each other at suitable intervals. Consequent- 1y, when member 23 is rotati-I'ig, eac'li 'h'eddle will alternately move up and down and will move up as another heddle moves down.

Within the member are two shuttle members which are moved around the center of the machine and supported on the small wheels 42 near the center and large horizontally placed wheels 61 adapted to travel in a suitable groove 62 in member 50. Each one of these shuttle members 60 has at one end near the member 50 small wheel 63 which extends beyond the shuttle frame 64 so that it may coact with the wheel 65, which is carried by shaft 33, as shown in Figure 3. The wheel 65 is so located with respect to wheel 63 that as the frame 31 is carried around the center of the machine, this wheel 65 pushes the shuttle around with it and as the frame 31 is carried around shaft 20, the small wheel 34 coacts with its track on the head member 40 so as to rotate and in rotating revolves wheel 65.

As the member 23 is carried around by the gear 26 the heddles move up and down in their proper order and the shuttle passes under each alternate warp cord 52 and over the intermediate cords due to the changing of the position of the cords by the heddles. The wheel 65 rotating against wheel 63 and mov ing the shuttle in its circular path will easily and without danger to the cord, roll it up between the two wheels, as the shuttle passes.

Each shuttle 60 carries thereon a reel which contains the weft material and allows it to be pulled out to the weaving position at the mandrels 43 and 46.

As the weft material 71 is drawn from the reel, it passes over two pins 72 and 73 and be hind an intermediate pin 74. The intermediate pin is in fixed position upon the shuttle frame while the two pins 72 and 73 are carried by an arm 75 pivoted at 76 on the frame, both pins being on the same side of the pivot. The arm is extended beyond the pivot 76 and has at its other end a shoe member 77 which has secured thereto a spring 78 secured at its other end to the frame 64 in such position as to move the arm 75 to bring the pins 72, 73 and 74 out of alignment and pull the shoe 7 7 to the dotted line position shown in Figure 4. So long as sufiicient tension is applied to the end 71 of the weft material, that is, so long as the weaving operation is being conducted satisfactorily with a continuous drawing of the weft material from the reel 70, the tension on this material will maintain the pins 72, 73 and 74 in substantial alignment and the shoe 77 in approximately the position shown in full lines in Figure 4. However, if the weft material breaks and thereby tension is taken from it, the spring 78 will immediately pull the shoe 77 to the dotted line position in Figure 4 and this shoe will then set in motion the following described mechanism to stop the machine.

It will be observed that the specific arrangement of the pins 72, 73, and 74, the shoe 77, and the spring 78 performs three useful functions in the operation of the device.

(A) Intermittent pull on cord 71 due to the weaving apparatus, tends to pull pins 72 and 73 to the left and thereby causes a cushioning or intermittent tensioning of the cord 71, due to the spring caused tendency of pins 72 and 73 to move to the right (Fig. 4) around pivot '76, this tendency being opposed by the cord tension. This tensioning is normal and satisfactory and keeps cord 71 straight and unsnarled, and also keeps shoe 77 away from its power release position.

(B) In the event the cord severs at any point, there will be no opposition to spring 7 8, and the latter will move pins 72 and 73 to the right, and will move shoe 77 t0 the left, whereupon the latter will engage the power release mechanism, as described below.

(C) In the event the cord supply clogs on the reel 70, the intermittent tension on cord 71 will first cause pins 72 and 73 to move to the left a great distance, or until they are so staggered with respect to pin 74 that the cord will run in a straight line from the right side of 72, past the left side of 74, and past the right side of 73, thus instantaneously, tho temporarily, relieving the tension on reel 70 and the snarl or clog. In the next instant, the tension on cord 71 is relieved, due to the intermittent tension of the weaving apparatus, and pins 72 and 73 will snap halfway to the right and exert an excessive tension on cord 71 and reel 7 0, thus relieving the snarl or clog, which had in the meantime been relieved of tension.

Summing up, it will be seen that pins 72 and 73 have three possible operating positions:

(a) extreme right-when tension is relievedshuts off power;

(6) midwaywhen tension is relievedcushioning effect (c) extreme leftwhen reel 70 clogs supplypins are so staggered that cord runs in straight line.

Mounted on the portion 50 of the frame is a horizontal shaft 80 which has at its outer end a handle 81 serving to permit manual movement of the shaft and having at its in inner end a short vertical shaft 82 secured to shaft 80 by means of a suitable fitting 83. lVhen the shoe 77 swings to the dotted line position of Figure 4, it strikes the end of shaft 82, and thereby causes a partial rotation of shaft 80 in a counter-clockwise direction, assuming the observer to be at the right of Figure 2 and the shuttles to be moving counter-clockwise (Fig. 1).

lVhen shaft 80 is moved as indicated the projection 85 carried thereby is moved from behind a cooperating projection 86 carried by a horizontally movable arm 87 carried by or formed upon the upper end of a vertically shifter therefor, a vertically arranged shaft connected to said spring controlled power arranged shaft 88. This shaft 88 has at its lower end, or near the latter, a second horizontal arm 89 connected to a longitudinally movable rod 90, carrying abelt shifting fork 91, and slidable ina suitable guide 92. A second guide and abutment 93 serves as a stop member forthe fork and betvveen this and a suitable collar 94 is placed a spring 95 arranged to be under compression when the belt 96 is on pulley 16. When, therefore, the Weft material 71 on a shuttle breaks,rthe shoe 77 moves out and strikes shaft 82 releasing arm 87 and allowing the belt tobe shifted, a

through the expansion of spring 95, to the idler pulley 17.

NOW having described the invention and the preferred form of embodiment thereof it is to be understood that the said invention is to be limited, not to the specific details herein set forth but only by the scope of the claims Which follow.

I claim:

1. Ina belt driven loom, a shuttle carry-' ing a supply of Weaving material, movable Weaving means, and a device between said shuttle and said vveaving'mean's to cause sald Weaving means to come to rest when the tension exerted by the latter on the supply causes the material to sever, said device includlng a pair of spaced movable pins, a stationary pin therebetvveen around Wh1ch sa1d Weaving material runs, and a spring, said movable pins being movable as a unit, and

i being held in one position by the material under tension due to the pull of said Weaving means, and against the tendency of said spring, said movable pins at the sametime exerting a tension on the material adjacent the shuttle, said movable pins being further movable against the spring tendency by the material tension When the shuttle supply becomes clogged to temporarily relieve the tension on said supply. 7

2. In a loom, a spring controlled power shifter, means forholding said power shifter 1n drlvlng relat1on comprising a rockable trigger engaging said vertical shaft and having a vertically depending arm thereon, a shuttle carrying a supply of Weft material andmeans on said shuttle for engaging the arm on said l rockalole trigger for stopping the loom, said means comprising a tension i lever having an upstanding bar mounted on an aXis transverse to the axis of the Weft material and held out of engagement With said arm during normal tension, said bar engaging said depending arm when the Weft fails or becomes abnormally slack.

. FRANK D. SAYLOR. 

